Experimental and numerical investigation of nanofluid forced convection inside a wide microchannel heat sink
Experimental and numerical investigation of nanofluid forced convection inside a wide microchannel heat sink
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DOI：
10.1016/j.applthermaleng.2011.10.023
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发表时间：
2012-04-01
影响因子：
6.4
通讯作者：
Harting, Jens
中科院分区：
文献类型：
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作者：
Kalteh, Mohammad;Abbassi, Abbas;Harting, Jens
本文旨在研究氧化铝-水纳米流体在宽矩形微通道热沉（94.3 mm，28.1 mm和580 um：长，宽和高，分别）内的层流对流换热的数值模拟和实验。为了进行实验研究，使用具有玻璃层的硅晶片制作微通道。对于数值研究，两相欧拉-欧拉方法采用有限体积法在这项研究中。实验和数值模拟结果的比较表明，两相模型的计算结果比单相模型的计算结果更接近实验结果。与实验结果的最大偏差为12.61%和两相法，分别为7.42%。这一发现表明两相法比均相法更适合于模拟纳米流体的传热。同时，两相流的结果表明，两相之间的速度和温度差非常小，可以忽略不计。此外，平均努塞尔数的增加与雷诺数和体积浓度的增加，以及与纳米粒子的尺寸减小。(C)2011爱思唯尔有限公司保留所有权利。
This paper aims to study the laminar convective heat transfer of an alumina-water nanofluid flow inside a wide rectangular microchannel heat sink (94.3 mm, 28.1 mm and 580 urn: length, width and height, respectively) both numerically and experimentally. For experimental study, a microchannel is made using a silicon wafer with glass layers. For the numerical study, a two-phase Eulerian-Eulerian method using the finite volume approach is adopted in this study. Comparing the experimental and numerical results show that two-phase results are in better agreement with experimental results than the homogeneous (single-phase) modeling. The maximum deviation from experimental results is 12.61% and 7.42% for homogeneous and two-phase methods, respectively. This findings show that the two-phase method is more appropriate than the homogeneous method to simulate the nanofluid heat transfer. Also, the two-phase results show that the velocity and temperature difference between the phases is very small and negligible. Moreover, the average Nusselt number increases with an increase in Reynolds number and volume concentration as well as with a decrease in the nanoparticle size. (C) 2011 Elsevier Ltd. All rights reserved.